Temperature measurement in harsh environments is a major challenge for the process industry. With new technology developed by RISE in collaboration with Agellis, the industry’s processes are improving and becoming more efficient. Now the technology is being brought to the market.
For process industries, in particular the metals industries, temperature is the most important measurement parameter in terms of cost-effectiveness and quality. The high temperatures and generally harsh environment in the processes mean that conventional temperature measurement technology does not function optimally.
Disposable thermocouples are often the only solution, but they provide a momentary temperature value and the process cannot be properly controlled. A new technology called Broadband Spectral Thermometry (BST) has now reached the market after close collaboration between technology provider Agellis RHI Magnesita and RISE.
– “By introducing BST into the industry, a non-contact method with high accuracy and immediate performance validation will enable foundries and steel and metal producers around the world to refine and optimise processes to completely new levels”.
Based on fibre optics
The technology is based on fibre optics which collect thermal radiation and then transfer it to measurement reading equipment. Then wavelength spectra are analysed with smart algorithms to determine the process temperature. This combination of technologies offers several advantages. The measurement is contactless, continuous, and stable, and also handles external interference, such as from dust, much better than conventional IR thermometers. It also allows other parameters to be followed, such as slag build-up and the presence of alkalis.
– “The ability to collect process radiation using fibre optics and route it to reading equipment at a safe distance from the harsh environment is a good example of how fibre optic sensors create added value in the process industry,” says Erik Zetterlund, head of Fibre optics and photonics at RISE.
This is very difficult to accomplish with conventional methods
"The metallurgist’s dream"
Agellis has developed a commercial product with BST technology aimed at fulfilling the metallurgist’s dream of having access to correct, accurate online measurements throughout the process.
– “According to Agellis, this is very difficult to accomplish with conventional methods, and, without good measurement technology, it can result in excessive energy consumption and quality problems. With BST technology, the dream can become a reality”.
It is believed that the commercial BST technology will help the Swedish and international steel and process industries to achieve better and more efficient processes. Furthermore, it will generate revenue for Agellis.
– “I think we have succeeded very well when innovations reach the market and create direct value in Swedish industry,” says Zetterlund. “It clearly shows that we can take a technology all the way from identifying needs and developing the technology to a commercial product.
Increases competitiveness
Greater opportunity for continuous control of process temperatures, which the technology provides, creates the right conditions for better quality, lower energy consumption and lower costs in the Swedish process industry.
– “The technology increases competitiveness for end-use industries, as well as for technology provider Agellis, who has a new unique product in its product portfolio,” concludes Zetterlund.